1、《搭建之前，我们需要有Nacos的安装包，我用的是1.1.4版本》解压完以后，进入到bin目录，双击startup.cmd进行启动，然后访问http://localhost:8848/nacos，进行登录，账号密码默认nacos，nacos。就是这个模样的

2、搭建流程，首先我们创建一个空的项目目录

3、创建完以后，查看自己的maven是否配置好

4、创建两个Maven模块，名字随意

5、将provider中加入依赖和配置文件和启动类和接口

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.2.RELEASE</version>
</parent>


<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        <version>0.2.2.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<!-- SpringCloud的依赖 -->
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Greenwich.SR2</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

server.port=8070
spring.application.name=nacos-provider
# nacos服务地址
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
# 自定义参数
myName=nacos

package com.cn;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

/**
 * @create: 2021-07-23 14:46
 **/
@SpringBootApplication
@EnableDiscoveryClient //开启服务注册发现功能
public class nacosProviderApplication {
    public static void main(String[] args) {
        SpringApplication.run(nacosProviderApplication.class, args);
    }

}

package com.cn.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @create: 2021-07-23 14:58
 **/
@RestController
@RequestMapping("/nacos/provider")
//@RefreshScope
public class providerController {

    @Value("${myName}")
    private String myName;

    @RequestMapping("/hello")
    public String hello(){
        return "你好，我是提供者" + myName;
    }

}

6、将consumer中加入依赖和增加配置文件和启动类

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.2.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>0.2.2.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <!-- SpringCloud的依赖 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Greenwich.SR2</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

server.port=8071
spring.application.name=nacos-consumer
# nacos服务地址
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
# 自定义参数
myName=nacosConsumer

package com.cn;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

/**
 * @create: 2021-07-23 14:46
 **/
@SpringBootApplication
@EnableDiscoveryClient //开启服务注册发现功能
@EnableFeignClients  //开启远程调用
public class nacosConsumerApplication {
    public static void main(String[] args) {
        SpringApplication.run(nacosConsumerApplication.class, args);
    }

}

6、然后启动Provider服务和consumer服务，登录Nacos，可以看到Provider和consumer已经注册进去了

7、我们利用springCloud的fegin进行远程调用，首先我们在provider中建立接口

package com.cn;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

/**
 * @create: 2021-07-23 14:46
 **/
@SpringBootApplication
@EnableDiscoveryClient  //开启服务注册发现功能
public class nacosProviderApplication {
    public static void main(String[] args) {
        SpringApplication.run(nacosProviderApplication.class, args);
    }

}

8、在consumer中同时也建立接口

package com.cn.controller;

import com.cn.fegin.providerFegin;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @create: 2021-07-23 15:00
 **/
@RequestMapping("/nacos/consumer")
@RestController
public class consumerController {

    @Autowired
    private providerFegin providerFegin;//注入远程调用接口

    @RequestMapping("/hi")
    public String hi(){
        return providerFegin.hello();
    }

}

package com.cn.fegin;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * @author: 王乾
 * @create: 2021-07-23 15:05
 **/
@FeignClient(name = "nacos-provider")//指定远程调用方的名字
public interface providerFegin {

    /**
     * @Description: 调用的是服务提供方提供的接口
     * @Author: 王乾
     * @Date: 2021/7/23 15:07
     **/
    @RequestMapping("/nacos/provider/hello")//路径一定写全路径
    public String hello();

}

9、将两个项目重新启动，浏览器访问http://127.0.0.1:8071//nacos/consumer/hi，查看调用情况